<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="/postdemo" method="POST">
		用户:<input name="username" type="text"><br>
		密码:<input name="password" type="password"><br>
		<input type="submit">
	</form>

</body>
</html>